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    <p>This is a brief example on how to make your program using a very simple class.</p> <p>You could easyly change it and ask how many numbers you want to calculate the average.</p> <pre><code>/* using default package */ import java.util.ArrayList; import java.util.List; import java.util.Scanner; /** * The Class Average3. */ public class Average3 { /** The number list. */ private List&lt;Integer&gt; numberList; /** The sum. */ private float sum; /** * Instantiates a new my first class. */ public Average3() { this.numberList = new ArrayList&lt;Integer&gt;(); this.sum = 0; } /** * Adds the integer. * * @param integer the integer */ public void addInteger(int integer) { this.numberList.add(integer); this.sum += integer; } /** * Gets the average. * * @return the average */ public float getAverage() { return (this.sum/this.numberList.size()); } /** * Prints the Average. */ public void printAverage() { System.out.print("The average of "); for(int j = 0; j &lt; this.numberList.size()-1; j++) { Integer i = this.numberList.get(j); System.out.print(i.toString() + ", "); } System.out.print("and " + numberList.get(numberList.size()-1)); System.out.println(" = " + this.getAverage()); } /** * The main method. * * @param args the arguments */ public static void main(String[] args) { Average3 myClass = new Average3(); System.out.println("Enter the first integer."); Scanner keyboard = new Scanner(System.in); myClass.addInteger(keyboard.nextInt()); System.out.println("Enter the second integer."); myClass.addInteger(keyboard.nextInt()); System.out.println("Enter the third integer."); myClass.addInteger(keyboard.nextInt()); myClass.printAverage(); } } </code></pre>
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    1. POusing a method in java
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    1. USNuno Aniceto
    1. USNuno Aniceto
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    1. COYour average computation is really buggy. Based on this method, the average of 2, 2, 2 and 2 is... 0. And why compute the average (and repeat the same bug) at two places? Don't repeat yourself!
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      1. USJB Nizet
    2. COBeware of integer division!
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      1. USTed Hopp
    3. COsure, really forgot that division does require float-precision numbers :D
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      1. USNuno Aniceto
 

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